/*
* Start monitoring a directory.
* We store the DirInfo pointer as the userdata in the kevent.
*/
static int monitor_start(FAMConnection *fc, DirInfo *dir)
{
int code;
kevent_t *kev;
#ifdef FAM_DEBUG
fprintf(stderr, "Monitoring directory %s\n", dir->name);
fflush(stderr);
#endif
code = -1;
if ((kev = new_kevent())) {
dir->kevent = kev;
/* Register interest in the MON_FLAGS flags of the dir */
EV_SET(kev, dir->handle, EVFILT_VNODE, EV_ADD | EV_CLEAR, MON_FLAGS,
(intptr_t) NULL, (kqueue_udata_t) dir);
code = kevent(fc->id, kev, 1, NULL, 0, &gTime0);
#ifdef FAM_DEBUG
fprintf(stderr,
" Directory id: %d\n"
" kevent code: %d\n", dir->handle, code);
fflush(stderr);
#endif
}
if(code < 0)
{
if(kev)
{
free(kev);
dir->kevent = NULL;
}
perror("monitor_start");
}
return code;
}
/*
* Poll for an event and put any on the fc->event list
*/
static int poll_kevent(FAMConnection *fc, struct timespec *timeptr)
{
int result, more_events=1;
FAMEvent *fevent;
kevent_t *kev;
#ifdef FAM_DEBUG
fprintf(stderr, "Polling FAM Connection\n");
fflush(stderr);
#endif
if ((kev = new_kevent())) {
result = kevent( fc->id, NULL, 0, kev, 1, timeptr );
if(result == 0) {
free(kev);
return 0;
} else if(result < 0) {
free(kev);
switch(errno) {
case EACCES:
FAMErrno = FAM_PERMISSION_DENIED;
break;
case ENOMEM:
FAMErrno = FAM_OUT_OF_MEMORY;
break;
default:
FAMErrno = FAM_UNKNOWN_ERROR;
};
return -1;
}
/* Convert each possible event flag to a FAM event */
if(kev->fflags & MEMBER_CHANGED_FLAGS) {
if (add_famevent_of_kevent( fc, kev, FAMDirectoryChanged ) == 0)
goto poll_error;
};
if(kev->fflags & NOTE_DELETE) {
if (add_famevent_of_kevent( fc, kev, FAMDeleted ) == 0)
goto poll_error;
};
if(kev->fflags & NOTE_RENAME) {
if (add_famevent_of_kevent( fc, kev, FAMMoved ) == 0)
goto poll_error;
};
if(kev->fflags & NOTE_REVOKE) { /* Lost access */
if (add_famevent_of_kevent( fc, kev, FAMDeleted ) == 0)
goto poll_error;
};
if(kev->fflags & NOTE_ATTRIB) {
if (add_famevent_of_kevent( fc, kev, FAMChanged ) == 0)
goto poll_error;
};
free(kev);
return 1;
poll_error:
free(kev);
}
FAMErrno = FAM_OUT_OF_MEMORY;
return -1;
}
